Page 136 - Robot Design Handbook ROBOCON Malaysia 2019

single channel, bi-directional motor driver to drive its movements. The speed of the robot is

controlled by pulsed wide modulation (PWM), generated by the micro-controller while the
direction is controlled by changing the state of a digital pin on the micro-controller. Figure

6 shows the circuit diagram of the MR1.

Figure 6 : A pictographic diagram of the electronic devices

The manual robot is operated using a wired PS2 joystick. A wired joystick is used

because of the lack of reliable and simple Bluetooth or WIFI joystick in hand. Other than
that, an optical sensor is used to give a signal to the second robot to start moving.

2.3 Software Design

In the software design, the main software used for the development of this robot is
the software used to programme the controller and the software used to do the 3D design of

the robot. A software for is also used to convert the 3D designed parts for 3D printing. A

programme comprises sets of instructions formulated to control the movement or action of
a robot. The micro-controller needs to be pre-programmed with instructions to react to

inputs provided by the human operator or move autonomously according to input or
conditions pre-programmed in it. Instruction for the motor speed, direction and display

among others are programmed into the micro-controller.

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